While YOU may be able to get the same rates, term; MOST banks do not. I know most banks won't touch a modular home loan with a 10 foot pole. If they do, MOST will charge a much higher interest rate and will at most only allow a 8-15 year term.
In the case of a foreclosed modular home or even "reposed", the resale is major shit compared to a "stick" built home. Most are lucky to sell for more than $2,000. A foreclosed "stick" built home will go for much, much higher than that in the same area. This comes from my wife that works in Huntington Bank's Litigation and Morgage collection department. She deals with foreclosed home sales daily for the bank.